Synthesis of formazan-3-yltriazolium salts: A new class of formazan and crown-formazan derivatives of expected useful applications
作者:Yehia A Ibrahim
DOI:10.1016/s0040-4020(97)00508-5
日期:1997.6
1-aza-2-azoniaallene salts 3 react with 3-cyanoformazans 4–6 to give the corresponding 5-(1,5-diarylformazan-3-yl)triazolium salts 7–9 or the rearrangement derivatives 10–12 or the oxidation products 13–15. Reaction of 3a,d with the crown cyanoformazan 18 gave the corresponding crown-formazanyltriazolium salts 19a,d. Oxidation of the formazans 4. 10b with t-BuOCl afforded the corresponding tetrazolium salts 16. 13b
Method of measuring substance in sample using a redox reaction
申请人:Kyoto Daiichi Kagaku Co., Ltd.
公开号:US20020025546A1
公开(公告)日:2002-02-28
A highly reliable method of measuring an analyte in a sample using a redox reaction. In this method, a tetrazolium compound is added to a sample prior to the redox reaction so as to eliminate the influence of any reducing substance in the sample, then a reducing substance or an oxidizing substance derived from the analyte is formed, the quantity of the formed substance derived from the analyte is measured by the redox reaction, and the quantity of the analyte is determined from the quantity of the formed substance derived from the analyte. As the tetrazolium compound, for example, 2-(4-iodophenyl)-3-(2,4-dinitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium salt can be used.
Redox reactions for analyte determination using tetrazolium compounds
申请人:Kyoto Daiichi Kagaku Co., Ltd.
公开号:EP1002874A2
公开(公告)日:2000-05-24
A highly reliable method of measuring an analyte in a sample using a redox reaction. In this method, a tetrazolium compound is added to a sample prior to the redox reaction so as to eliminate the influence of any reducing substance in the sample, then a reducing substance or an oxidizing substance derived from the analyte is formed, the quantity of the formed substance derived from the analyte is measured by the redox reaction, and the quantity of the analyte is determined from the quantity of the formed substance derived from the analyte. As the tetrazolium compound, for example, 2-(4-iodophenyl)-3-(2,4-dinitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium salt can be used.